Bracing attachment for lathe-tool carriages.



No. 801,787. PATENTED OCT. 10, 1905.

k B. M. W. HANSON. BRAGING ATTACHMENT FOR LATHE TOOL GARRIAGES.

APYLIOATION FILED OUT. 8. 1904.

2 SHEBTS-SHEET l.

mnnzw a camm co PKOKO-LIIWGRAPNERS. wnsmmvon. n c

PATENTED OCT. 10, 1905.

B. M. W. HANSON.

BRAGING ATTACHMENT FOE LATHE TOOL GARRIAGES.

APPLIGATION FILED 0OT.8.1904.

2 SHEETS-SHEET 2.

was. w:

UNITE STATES PATENT OFFICE.

BENGT M. IV. HANSON, OF HARTFORD, CONNECTICUT, ASSIGNOR TO PRATT & IVHITNEY COMPANY, OF HARTFORD, CONNECTICUT, A

CORPORATION OF NEW JERSEY.

Specification of Letters Patent.

Patented Oct. 10, 1905.

Application filed OCtObBI' 8, 1904. Serial No. 227,671-

To all 1 07 7'15 DZ/LZ/ concern:

Be it known that I, BENGT M. W. HANSON, a citizen of Sweden, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Bracing Attachments for Lathe-Tool Carriages, of which the following is a specification.

WVhen the tool carried by the slide-rest of a latheis in engagement with stock being turned, the thrust against said tool is considerable and has a torsional effect on the carriage of the slide-rest, there by causing or tending to cause binding of said carriage on the ways of the bed upon which it travels. Again, when the tool-carriage is at the limit of its movement toward the head-stock it is in ordinary constructions known to me impossible to move the tail-stock up close to the slide-rest, thereby causing great inconvenience in adapting the lathe to operate upon short stock.

Primarily, the object of the present invention is the provision of a brace for the toolcarriage which will prevent binding of the same upon the shears and will also prevent: rising or tipping action of said carriage when the tool carried by the slide-rest is in action upon stock.

In connection with the foregoing a further object of the invention is the provision of a carriage having a depressed central portion and overhanging ends grooved on their under sides to fit upon the shears of the lathe, whereby the tail-stock may be run up in close prox-' imity to the head-stock, as will be hereinafter explained.

Other objects of the invention will hereinafter be set forth.

In the accompanying drawings, Figure 1 is a plan view of the carriage of a lathe, showing a portion of the lathe-bed and a brace attached to said carriage, and Fig. 2 is a cross-sectional view on line 2 2 of Fig. 1 looking in the direction of the arrow, illustrating the carriage and its brace in elevation and showing by dotted lines a tail-stock in close proximity to the slide-rest.

Referring to the drawings, the numeral 5 designates the bed, and 5 5 the shears of said bed, on which the carriage is slidably secured by means of gibs. This carriage is designated by 6 and is provided at its inner end with an overhanging extension 7, grooved on its under side to fit upon the guideway or shear 5 to which it is secured by a gib 8. Later-ally projecting from the inner side of said carriage is a long guide 9, also grooved on its under side to fit one of the shears 5, said guide acting as a long lever-arm to steady and sustain the carriage, and projecting from said guide is the usual apron 10, carrying a nut (not shown) for the lead-screw 12, the apron being secured to the guide by bolts 13. In this apron is fitted a shaft and gear (not shown) for manually actuating the carriage by wheel 14, said devices being of ordinary kind, and therefore unnecessary further to describe.

Designated by 15 is the tool-carrying slide of the lathe, which may be manipulated in the ordinary manner, and said slide travels upon ways of an extension 16, projecting from an overhang 1'7, rising from the forward end of carriage 6 and grooved on its under side to receive the front shear 5, as shown in Fig. 2.

Between the overhanging grooved extensions the carriage 6 is depressed below the tops of the shears and is provided with guide ways 18, upon which is fitted a guide-block 19, secured to or integral with the inner end of the slide 15 and projecting inward therefrom, the block having a foot 19', grooved to fit said ways and held thereon by the usual binder, the bolt of which is designated by 20.

On the top of cross-slide 15 a turret 21 is mounted for intermittent rotation in the common way and is to be equipped with a number of tools, the desired one of which may be brought into position for action on the stock by indexing the turret in the usual manner. Inasmuch as the character of tool-holder employed is immaterial and as said feature constitutes no part of the invention, further description of the parts just mentioned is deemed unnecessary.

Designated by 22 is the improved brace, which is shown of angular form, is provided with a base 23, secured to the lower part of the side of carriage 6 by bolts 2%, and with a long foot 25, rabbeted to receive a projection on a guideway 26, to which it is h'tted by a strap or bar 27. Bolts 28 secure the guideway 26 to the inner side of the forward latheshear 5, as illustrated in Fig. 2. A strap or bar 29, bolted to apron 16, serves to hold said apron in place by bearing against the under side of the shear 5.

As will be seen by reference to Fig. 2, the base of the brace 22 extends entirely across the depressed part of carriage 6, while its extension 25, fitted upon the guideway 26, serves as a long lever-arm to prevent deflection of the carriage under the stress of the cutting action. As illustrated, this brace is secured at its base 23 to the lower part of the carriage 6, and as its long arm 25 travels upon the under side of the guide 26 the entire brace is located at a point below the line of movement of the tail-stock, in virtue of which said tail-stock may be adjusted over the brace until it is in close proximity to the head-stock, thus enabling any desired length of stock to be operated upon by a tool carried by the slide-rest of the machine.

Illustrated by dotted lines in Fig. 2 and designated by 30 is a common form of tailstock, and it will be obvious that as the tailstock is supported above the depressed portion of the carriage it may be readily moved forward without interference with the-brace until it comes into contact with the foot 19 or with the overhanging ends of the carriage 6.

From the above description it will be seen that the carriage is stiffened by depressed brace 22 on one side and by the long extension 9 on the other and that therefore binding of said carriage upon its ways is impossible.

While the construction shown is preferable, the invention is not limited to the exact devices described, for various changes may be made in the form, proportion, and location of the parts without departure therefrom.

Having thus described my invention, what I claim is v 1.. The combination, with the shears of a machine-frame, of a carriage; a brace secured to said carriage, located below said shears, and serving to prevent binding of the carriage while the tool is in action; and a tail-stock supported on said shears, and movable over the brace.

2. The combination, with a bed having ways, of a carriage having a depressed portion between said ways; a brace secured to the side-of the depressed part of the carriage, and

located below the ways; and a guide for said brace.

3. The combination, with a bed having ways, of a carriage fitted upon the ways and depressed between them; a laterally-extending brace rigid with the carriage, and having an extension located below said ways; a guide rigid with the bed, and upon which said extension of the brace is fitted; and means for securing said guide to one of the sides of the bed below the way thereof.

4,. The combination, with a bed having ways, of a carriage fitted on said ways and depressed between them; a brace having a base rigid with the depressed part of the carriage, and an extending foot; and a guide for said foot on the inner side of the bed, and below one of the ways thereof.

5. The combination, with a bed having ways, of a carriage fitted upon said ways, and having a depressed portion; a grooved extension fitted upon one of the ways, and projecting from one side of the carriage; a brace bolted to the depressed part of the carriage, and having an extended foot; a guide upon which said foot is fitted, said guide being located below one of the ways of the bed; and means for securing said guide to the bed.

6. The combination, with a bed having ways, of a tail-stock; a carriage fitted to said ways; a brace located below the ways, and having a base bolted to the carriage, and also having an extended foot; a guide on the bed upon which the foot of the brace is fitted; means for securing the guide to the bed; and an extension projecting laterally from the carriage at the side thereof opposite the brace, said extension being fitted upon one of the ways.

7 The combination, with a bed having ways, of a carriage mounted on the ways; a brace having a base secured to the carriage, and having an extension projecting from said base, and serving as a lever-arm to prevent binding of the carriage; a gulde for said extension; and a tail-stock mounted on the ways, and beneath which the brace may pass.

In testimony whereof I affix my signature in presence of two witnesses.

BEN GT M. W. HANSON. Witnesses:

H. E. BAILEY, J. H. LUCAS. 

